{"product_id":"att-unite-pro-replacement-battery-37v-2400mah-li-ion","title":"AT\u0026T Unite Pro W-6 Replacement Battery 3.7V 2400mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eAT\u0026amp;T Unite Pro \/ Aircard 781S — 3.7V Li-ion Replacement Battery (W-6)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis 3.7V 2400mAh Li-ion battery replaces the factory cell in the AT\u0026amp;T Unite Pro, Unite Pro 4G, Unite Pro 4G LTE, and Aircard 781S mobile hotspots. It fits the OEM battery tray directly and connects to the device BMS without modification. Capacity matches the original spec at 8.88Wh.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eUnite Pro and Aircard 781S compatibility:\u003c\/strong\u003e\n    These models share the same 3.7V battery rail, connector pinout, and BMS handshake protocol — one cell covers the full range listed. No firmware differences affect charging behavior across these variants.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We cycled this battery through charge and discharge on a Unite Pro 4G LTE unit. The BMS accepted the cell without fault flags, held cutoff at 3.0V on the low end, and reached full charge termination at 4.2V without thermal events.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eVentilation during extended hotspot sessions:\u003c\/strong\u003e\n    Keep the device flat on an open surface — not in a bag or pocket — during long sessions. When connected devices are far from the hotspot, the cellular radio runs at peak transmit power continuously, generating heat that accelerates cell wear.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eWhy the Unite Pro drops connected devices mid-session on a new battery\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe Unite Pro runs both a cellular modem and a 2.4\/5GHz Wi-Fi radio simultaneously. When all connection slots fill up and the cellular signal is weak, combined current draw spikes sharply. If the cell's internal resistance is elevated — common in aged batteries — voltage sags below the modem's minimum operating threshold, triggering a radio reset that drops all connected devices. A fresh cell with lower internal resistance holds voltage stable under that combined load.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eUnite Pro shows full charge icon but dies quickly after unplugging\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThis happens when the original battery has lost capacity through shallow cycling — frequent top-ups without full discharge cycles compress the active electrode material over time. The device fuel gauge still reads the stored charge curve but the actual deliverable capacity has dropped significantly. Replacing the cell resets this — the new 2400mAh cell will show accurate state-of-charge readings after one complete charge-to-discharge cycle. Run it down to the low-battery warning once, then charge fully to 4.2V to calibrate the gauge.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43377851433050,"sku":"BWCS-ATP781RX-1","price":27.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43377851465818,"sku":"BWCS-ATP781RX-2","price":31.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43377851498586,"sku":"BWCS-ATP781RX-3","price":34.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-ATP781RX-1.webp?v=1778773918","url":"https:\/\/batteryweb.com\/products\/att-unite-pro-replacement-battery-37v-2400mah-li-ion","provider":"BatteryWeb","version":"1.0","type":"link"}